No special access issues
The area is popular for hikers and outdoor trips for the locals. Be respectful. Park on the parking lots close to the bridge, and don't occupy more parking space than you need. Don't block the forest road going into the forest. To reach the northern sector, walk along the forest road. Most of the boulders can be found uphill on the right side of the road, ca. 50 meters before the road ends. To reach the southern sector, find a small trail by the river, and follow it for a few minutes until you find a cliff. Follow this cliff to find the boulders.